%0 Journal Article
%A M. H. Lee 
%T Casimir Operators on Pseudodifferential Operators of Several Variables
%J Journal of Lie theory
%D 2002
%P 483-493
%V 12
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JLT_2002_12_2_JLT_2002_12_2_a9/
%F JLT_2002_12_2_JLT_2002_12_2_a9